PubMed · 9172495
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T Ishii, Y Kuyama. 1997. [Electrogastrography (EGG)].. https://pubmed.ncbi.nlm.nih.gov/9172495/
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Neurophysiological studies test the integrity of nerve roots and nerves at different points from the spinal cord to the periphery. EMG is the most sensitive neurophysiological test for evaluating patients with radiculopathy, providing information on diagnosis, location, and prognosis. F-wave and H-reflex studies may be abnormal, but the information that they provide is nonspecific and usually redundant because the needle examination is abnormal anyway. Somatosensory evoked potentials are less sensitive and specific than EMG for diagnosing a radiculopathy, but uncommonly may be the only abnormality. Magnetic stimulation, paraspinal mapping, and cervical root stimulation are investigational techniques of uncertain utility.
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